Air-strainer.



N. T. WOODS.

AIR STRAINER.

APPLICATION rum: APR. 5, 1912.

1,062,942, Patented May 27, 191 3.

WITNESSES: INVENTOR COLUMIIA WRAP" CO" wunmmn. D. C.

UNITED STATES PATENT OFFICE.

NELSON T. WOODS, F PORTLAND, OREGON, ASSIGNOR TO ROBERT W. MURRAY MCNAIR, OF VANCOUVER, BRITISH COLUMBIA, CANADA.

AIR-STRAIN ER.

Specification of Letters Patent.

Patented May 27 1913.

Application filed April 5, 1912. Serial No. 688,671.

, of which the following is a specification.

This invention relates to devices for separatmg o1ls or other foreign substances from air, and 1s particularly designed for use 1n the conduit wherethro-ugh air is delivered under pressure to pneumatic tires for distending the same.

The object of the invention is to produce a device of the character above referred to which operates elficiently and with a minimum of friction.

The invention consists essentially in the employment of a casing having oppositely disposedinlet and outlet openings and containing one or more screens which are disposed vertically and intermediate said openings; together with a valved opening at the bottom of the casing whereby liquid entrained by the screen may be Withdrawn.

The invention also consists in certain details of construction and organization, as hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a front elevation of a separating device constructed in accordance with the present invention, with a portion of the casing cap broken away. Fig. 2 is a vertical longitudinal section of the same.

In said drawings, 2 represents a casing which is desirably of a cylindrical form and is provided with a removable cap 3 at the front. Axially of said capit is provided with a screw threaded hole 4: whereintois engaged the end of a pipe 5 through which the air to be purified is supplied under pressure. In the rear end of the casing and in proximity to the top is an opening 6 wherethrough the air is discharged aft-er being cleaned. This opening advantageously extends through a nipple 7 adapted to be connected by a tube with a pneumatic tire, or other air receptacle.

Provided in the inner face of the peripheral wall of the casing is a plurality of annular grooves 8, 8 and 8 whereof the rear one, 8, is of less diameter than the adjacent groove, 8 while the latter is of less diameter than the front groove 8 To the rear of each of said grooves is a shoulder which respectively serves as a support for a foramino-us partition or screen 9, 9 and 9 The screens are removably retainedagainst such shoulders by metal rings 10', 10 and 10 which are s rung into the respective grooves. At the bottom of the chamber within the casing 2, is a gutter 11 which extends longitudinally between the end screens 9 and 9 as shown in'Fig. 2, and commu nicates with an opening 12 therebelow in the casing wall. Provided for the opening 12 is a draw-off cock 13.

In operation, the air to be cleaned is driven through the pip-e 5 and against the front screen 9 with the result that the greater portion of the oil is arrested by the screen, while the air thus relieved of a portion of the oil, passes bet-ween the meshes of this screen and is similarly subjected to a straining operation by the second screen, 9 and ultimately by the rear screen 9 so that when the air escapes through the outlet 6 it is clear of oil. The oil, or other substances deposited upon the screens flows downwardly into the gutter 11 and may be drawn off through the cook 13.

What I claim as my invention is An oil separator of the class described, comprising a casing provided with an inlet opening in the front thereof, an outlet opening in the rear and disposed at a higher elevation than said inlet opening, said casing being provided interiorly with a plurality of stepped shoulders of progressively NELSON T. WOODS.

lvitnesses:

J. W. lVInnRIoK, E. J. Lown.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

